A survey competition is simply a competition you enter by completing a survey or questionnaire (easy eh?). You will be asked to complete a few questions where there's no right answers, just your opinion!
Sites use surveys to gain feedback from their users, to compile data for articles and reports, or to provide information for sponsors. In some cases you may need to complete the survey for your entry to be accepted into the prize draw. As always Read the rules!
When entering "site feedback" style surveys, do make sure you're familiar with a site before offering your views. It helps the siteowner and makes their survey competition more worthwhile.
As well as winning prizes you can also gain rewards by completing surveys online.